Countertop air oven



FIG. 1 is a front perspective view of a countertop air oven showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a left side elevational view thereof.

The broken line showing of the food in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a countertop air oven, as shown and described. 